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Mongoose 1 µarch
General Info
Arch Type	CPU
Designer	Samsung
Manufacturer	Samsung
Process	14 nm
Pipeline
OoOE	Yes
Speculative	Yes
Reg Renaming	Yes
Decode	4-way
Succession
Mongoose 2

Mongoose 1 (M1) is an ARM microarchitecture designed by Samsung for their consumer electronics. This was Samsung's first in-house developed high-performance low-power ARM microarchitecture.

History

The Mongoose 1 (M1) microarchitecture was Samsung's first in-house design which was done entirely from scratch. A design team was assembled and in roughly 3 years, they've gone from requirements to tape-out. The design was done at Samsung's Austin R&D Center (SARC) which was founded in 2010 for the sole purpose of developing high-performance, low-power, complex CPU and System IPs. A large portion of the design team consists of many ex-AMD Austin engineers as well as ex-IBMers.

Process Technology

M1 was fabricated on Samsung's 14 nm process.

Architecture

The M1 is Samsung's first in-house design from scratch.

• ARM v8.0
  • AARch64 (A64)
  • AARch32 (A32)
    • Thumb support
• 2.6 GHz clock frequency
  • 2.3 GHz for multi-core workloads
• Sub 3-watt/core
• 14 nm process (FinFET)
• Core
  • Advanced branch predictor
  • 4-way instruction decode
    • Most instructions map to a single µOP, with a few exceptions
  • 4-way µOP dispatch and retire
  • Out-of-order execution
    • Out-of-order load and stores
  • Multistride/multistream prefetcher
  • Low-latency and low-power caches

Block Diagram

Entire SoC Overview

Individual Core

Memory Hierarchy

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Overview

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Core

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Die

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